Respiratory flow meter



FIG. 1 is a top, left-hand side perspective view of a respiratory flowmeter embodying our design;

FIG. 2 is a top elevational view thereof;

FIG. 3 is a front, left-hand side perspective view thereof;

FIG. 4 is a right-hand side elevational view thereof;

FIG. 5 is a bottom elevational view thereof;

FIG. 6 is a front elevational view thereof;

FIG. 7 is a back elevational view thereof; and,

FIG. 8 is a left-hand side elevational view thereof.

The ornamental design for a respiratory flow meter, as shown anddescribed.